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A large square sheet is folded in three like a fan from side to side, and then in three again from top to bottom, leaving a small square nine layers thick. One diamond is punched. Which figure shows the opened sheet?

Competition practicePaper Folding & Punching
  • A(a)
  • B(b)
  • C(c)
  • D(d)

Step-by-Step Solution

Each fan fold mirrors the hole into the outer parts. Across, the copies land at mirror positions about the two upright creases; down, about the two flat creases. Nine diamonds, not evenly spaced but in mirror pairs: (c).
Answer: C) (c)

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